4. A public library carries 50 magazines that focus on either news or sports. Thirty of them focus on news and the remaining 20 focus on sports. Among the 30 news magazines, 20 include international news and 10 include national, state or local news only. Among the 20 sports magazines, 5 focus on international sports and the remaining 15 focus on national, state, or local sports. a. A customer randomly selects a magazine from the table, what is the probability that it focuses on sports? b. What is the probability that the magazine includes international news given that it focuses on news?

4. A public library carries 50 magazines that focus on either news or sports. Thirty of them focus on news and the remaining 20 focus on sports. Among the 30 news magazines, 20 include international news and 10 include national, state or local news only. Among the 20 sports magazines, 5 focus on international sports and the remaining 15 focus on national, state, or local sports. a. A customer randomly selects a magazine from the table, what is the probability that it focuses on sports? b. What is the probability that the magazine includes international news given that it focuses on news?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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4. A public library carries 50 magazines that focus on either news or sports.
Thirty of them focus on news and the remaining 20 focus on sports.
Among the 30 news magazines, 20 include international news and 10
include national, state or local news only. Among the 20 sports
magazines, 5 focus on international sports and the remaining 15 focus on
national, state, or local sports.
a. A customer randomly selects a magazine from the table, what is the
probability that it focuses on sports?
b. What is the probability that the magazine includes international news
given that it focuses on news?

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